Pith Number

pith:UTPPBDHV

pith:2008:UTPPBDHVIXL4TUM3742W2C2YXO

not attested not anchored not stored refs pending

Linear Time Encoding of LDPC Codes

Jin Lu, Jos\'e M. F. Moura

arxiv:0810.2781 v1 · 2008-10-15 · cs.IT · math.IT

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UTPPBDHVIXL4TUM3742W2C2YXO}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:57:58.426115Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4def08cf545d7c9d19bff356d0b58bbbf3275ee7ddef8bdfeec979fbf35601a

Aliases

arxiv: 0810.2781 · arxiv_version: 0810.2781v1 · doi: 10.48550/arxiv.0810.2781 · pith_short_12: UTPPBDHVIXL4 · pith_short_16: UTPPBDHVIXL4TUM3 · pith_short_8: UTPPBDHV

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/UTPPBDHVIXL4TUM3742W2C2YXO \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: a4def08cf545d7c9d19bff356d0b58bbbf3275ee7ddef8bdfeec979fbf35601a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "422e261780eaf107d1506adf2d3a4854135fc9720f7725d0a744a86e76e49c72",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2008-10-15T19:32:48Z",
    "title_canon_sha256": "67f40328df0b4db2179715b76e359b866256baac08895decbd81d525461f6cc7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0810.2781",
    "kind": "arxiv",
    "version": 1
  }
}